Английская Википедия:1106 Cydonia

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1106 Cydonia (Шаблон:IPAc-en), provisional designation Шаблон:Mp, is a Eunomian asteroid from the central regions of the asteroid belt, approximately Шаблон:Convert in diameter. It was discovered on 5 February 1929, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Germany. The asteroid was named for the fruit-bearing tree Cydonia (quince). The S-type asteroid has a relatively short rotation period of 2.7 hours.

Orbit and classification

Cydonia is a member of the Eunomia family (Шаблон:Small), a prominent family of stony asteroids and the largest one in the intermediate main belt with more than 5,000 members. It orbits the Sun in the central asteroid belt at a distance of 2.3–2.9 AU once every 4 years and 2 months (1,528 days; semi-major axis 2.60 AU). Its orbit has an eccentricity of 0.13 and an inclination of 13° with respect to the ecliptic. The body's observation arc begins with its first and official discovery observation at Heidelberg in February 1929.

Physical characteristics

In the SMASS classification, Cydonia is a stony S-type asteroid, in-line with the Eunomia family's overall spectral type.Шаблон:Rp

Rotation period

In December 2015, a rotational lightcurve of Cydonia was obtained from photometric observations by astronomers at the Etscorn Observatory (Шаблон:Small) in New Mexico, United States. Lightcurve analysis gave a well-defined rotation period of 2.679 hours with a brightness variation of 0.28 magnitude (Шаблон:Small). In April 2017, Spanish astronomers at Puçol Observatory (Шаблон:Small) and other stations of the APTOG-network measured a similar period of 2.6700 hours and an amplitude of 0.10 magnitude (Шаблон:Small).

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Cydonia measures between 12.140 and 12.95 kilometers in diameter and its surface has an albedo between 0.1719 and 0.241.

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's parent body and namesake – and calculates a diameter of 13.26 kilometers based on an absolute magnitude of 11.7.

Naming

This minor planet was named after the genus Cydonia in the family Rosaceae, with the fruit-bearing quince tree as its only member. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (Шаблон:Small).

Reinmuth's flowers

Due to his many discoveries, Karl Reinmuth submitted a large list of 66 newly named asteroids in the early 1930s. The list covered his discoveries with numbers between Шаблон:MoMP and Шаблон:MoMP. This list also contained a sequence of 28 asteroids, starting with 1054 Forsytia, that were all named after plants, in particular flowering plants (also see list of minor planets named after animals and plants).

External links

• Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
• Dictionary of Minor Planet Names, Google books
• Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
• Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
• Шаблон:AstDys
• Шаблон:JPL small body